Patent GB-419014-A (GB)
Title: Improvements in trucks for spreading gravel and the like
IPC: E01C19/20
Filed: 1934-02-21
Abstract: 419,014. Distributers for gravel, concrete, &c. JOHANSON, E. R., Emmaboda, Sweden. Feb. 21, 1934, Nos. 5726 and 5727. Convention dates, March 2, 1933 and Oct. 9, 1933. [Class 6 (i).] A truck for spreading gravel, macadam, concrete, &c. is provided with a plate having a substantially horizontal working position and located at a distance below the discharge outlet of the truck body, a feed bar or scraper above the plate, and driving means for effecting a reciprocating or oscillating relative movement of the plate and bar or scraper in a direction transverse to the length of the plate to feed the material over its forward or rear edge, or both. In a motor truck provided with a tipping body or platform 16 a longitudinal shaft 4 is driven from the longitudinal driving shaft 1, when the platform 16 is tipped, by a spur wheel 2 engaging with a spur wheel 9 driving chain gearing 11, 12, 13. The gearing 9, 11, 12, 13 is mounted on a double lever 8 adjustably controlled by a spring 15 and bolt 17. The end 21 of a two-armed spring-controlled lever 19 normally engages a stop 22 to lock the spur wheels 2, 9 in engagement. When the tipping platform 16 is returned to horizontal position it depresses the lever 19 and causes it to engage a stop 24 on the lever 8 and move the gear wheel 9 away from the wheel 2. The shaft 4 drives a shaft 30 mounted in bearings on the platform 16 through gearing 26, 28 on the axle 27 of the platform. On the shaft 30 are discs 32 provided with adjustable crank pins 33 connected by rods 34 to the bar or scraper 40, which is of the shape shown and is provided with end rollers running between rails 43. Below the bar 40 is the substantially horizontal plate 37 secured to the truck body by side plates 39 and provided with a wearing plate 41. Distributing plates or pointed bars 46 of different lengths are attached to the plate 37. The discharge from the truck body is controlled by opening or closing a pivoted gate 45 automatically or by hand. For automatic operation the gate is coupled to spring-controlled notched bars 53 adapted to engage a pin 55 and having their rearward movement limited by a block. 57 which can be turned to adjust the opening of the gate 45. The gate is opened when the platform 16 is tilted and a projection 58 on the bars 53 engages a stop 59 and releases the bars 53 from the pin 55. The stop 59 is shaped so as to prevent the spring 60 from closing the gate while the platform is in tipped position. In a modification the bar or scraper 40 has projecting pins on its lower edge and is hung from rollers running on rails supported and covered by bent plates, the rollers being lubricated by means of nipples. The plate 37 may be reciprocated instead of the bar 40 ; or the feed bar 40 or the plate 37 may be suspended so as to oscillate. The lever 8 may be arranged to slide on the shaft 4. The driving mechanism may be disconnected by hand. The distributing mechanism may be removable. The Specification as open to inspection under Sect. 91 states that the shaft 30 may be journalled in the truck frame 5 and geared directly to the shaft 4. This subject-matter does not appear in the Specification as accepted.